Abstract: A switch-mode power supply includes a pair of input terminals, a pair of output terminals, and at least one switch coupled between the input terminals and the output terminals. The power supply further includes an analog-to-digital converter (ADC) for converting a sensed analog current value at the output terminals to an output digital value, an interface for receiving a user configurable current setting, and a control circuit coupled with the interface, the ADC and the at least one switch. The control circuit is configured to determine a raw digital value of the ADC that corresponds to the received current setting by processing an iterative loop, and turn on and turn off the at least one switch according to the determined raw digital value and the output digital value of the ADC, to supply an output current at the pair of output terminals that corresponds to the received current setting.

Abstract: An interleaved power converter includes a control circuit and multiple phase-shifted subconverters each having at least one power switch. The control circuit is coupled to the subconverters for controlling the power switches to balance currents in the subconverters over multiple periods. The control circuit includes a current compensator configured to determine a first duty cycle multiple times over the multiple periods, generate a PWM control signal having a present value of the first duty cycle for controlling the power switch of one of the subconverters during a period, determine a second duty cycle based on the present value of the first duty cycle and a previous value of the first duty cycle, and generate another PWM control signal having the second duty cycle for controlling the power switch of another one of the subconverters during the period. Other example power converters and control circuits are also disclosed.

Abstract: power supply module comprises a voltage converter coupled to first and second inputs. The voltage converter comprises a boosting circuit configured to boost an input voltage and comprises an input voltage selector (IVS) selectively connect and disconnect the first and second inputs to the boosting circuit. A first sensing circuit is coupled to the first input and comprises a pair of inputs coupled to the first input, a rectifier assembly, a resistor bank coupled between the pair of inputs and the rectifier assembly, a sense resistor coupled to the rectifier assembly, and a voltage sensor coupled to the sense resistor. A DC converter is configured to generate and supply an auxiliary voltage to the first sensing circuit. The resistor bank filters an electromagnetic interference (EMI) signal transmitted from the DC converter to a value below a threshold value.

Abstract: A switch-mode AC-DC power converter includes a pair of input terminals, a pair of output terminals, and four switches coupled in a bridgeless totem-pole circuit arrangement between the pair of input terminals and the pair of output terminals. A control circuit is coupled to the four switches and configured to, during a cycle of an AC voltage input, turn on the first switch, turn off the second switch, and apply pulse-width modulation (PWM) control signals to the third and fourth switches. The control circuit is also configured to, during a zero crossing of the AC voltage input, supply a PWM control signal to the fourth switch to reduce a rate of voltage change across the second switch at the zero crossing to reduce common mode noise of the power converter.

Abstract: A continuous coil for an inductive component includes a plurality of turns formed by at least one conductor. The continuous coil is substantially egg-shaped. Other example coils, transformers, etc. are also disclosed.

Abstract: An AC/DC power converter includes input terminals, output terminals, a power factor correction circuit coupled between the input and output terminals and including at least one power switch defining a switched current path, and a current transformer including a primary winding and a secondary winding. The primary winding is coupled in series with the switched current path. The power converter also includes a first sense switch coupled with a first end of the secondary winding, a second sense switch coupled with a second end of the secondary winding, and a control circuit. The control circuit is configured to turn on the first sense switch and turn off the second sense switch during a positive polarity of the AC voltage input, and to turn off the first sense switch and turn on the second sense switch during a negative polarity of the AC voltage input.

Abstract: A switch-mode power supply includes a pair of input terminals, a pair of output terminals, and at least four switches coupled in a three-level LLC circuit arrangement between the pair of input terminals and the pair of output terminals. First and second ones of the at least four switches define a first half-bridge and third and fourth ones of the at least four switches define a second half-bridge. The power supply also includes a fifth switch coupled across the second switch and the third switch to short circuit the second switch and the third switch when the fifth switch is closed, and a control circuit. The control circuit includes a voltage-controlled oscillator (VCO) and multiple logic gates and flip-flops coupled to operate the at least four switches with zero-voltage switching (ZVS).

Abstract: A circuit board assembly for electronic devices includes a circuit board having a first surface and a second surface opposite the first surface, and a heat sink carrier disposed on the first surface of the circuit board. The heat sink carrier includes at least one clamp portion. The assembly also includes a heat sink. The heat sink is positioned in the at least one clamp portion of the heat sink carrier to transfer heat from one or more electronic devices to the heat sink via the heat sink carrier.

Abstract: A power supply comprises a main circuit board and a multilayer power transmission board electrically coupled to the main circuit board. The multilayer board includes a conductive neutral layer having an inner side, a conductive line layer having an inner side facing the inner side of the conductive neutral layer, and a dielectric medium positioned between the conductive neutral layer and the conductive line layer. The power supply also comprises a first conductive outer layer positioned adjacently to an outer side of the conductive neutral layer, a second conductive outer layer positioned adjacently to an outer side of the conductive line layer, and a conductive plating material positioned within a slot formed in the multilayer power transmission board and covering an interior portion of the multilayer power transmission board facing the slot. The conductive plating material electrically couples the first and second conductive outer layers.

Abstract: A switch-mode power supply includes a pair of input terminals for receiving an alternating current (AC) or direct current (DC) voltage input from an input power source, a pair of output terminals for supplying a direct current (DC) voltage output to a load, and at least four switches coupled in a three-level LLC circuit arrangement between the pair of input terminals and the pair of output terminals. The power supply also includes a voltage doubler power factor correction (PFC) circuit coupled between the pair of input terminals and the three-level LLC circuit, and a control circuit coupled to operate the at least four switches to supply the DC voltage output to the load.

Abstract: An AC/DC power converter includes input terminals, output terminals, a power factor correction circuit coupled between the input and output terminals and including at least one power switch defining a switched current path, and a current transformer including a primary winding and a secondary winding. The primary winding is coupled in series with the switched current path. The power converter also includes a first sense switch coupled with a first end of the secondary winding, a second sense switch coupled with a second end of the secondary winding, and a control circuit. The control circuit is configured to turn on the first sense switch and turn off the second sense switch during a positive polarity of the AC voltage input, and to turn off the first sense switch and turn on the second sense switch during a negative polarity of the AC voltage input.

Abstract: A power transformer includes at least two first windings, at least two second windings interleaved with the at least two first windings, and a magnetic core. The at least two first windings and the at least two second windings are positioned adjacent the magnetic core. Each first winding includes a wire and a plurality of turns. One or more windings of the at least two first windings include a bonding material and at least two adjacent turns of said plurality of turns adhered to each other via the bonding material. Other example power transformers, methods of manufacturing power transformers, and methods of manufacturing windings are also disclosed.

Abstract: A switched mode power supply comprises a communication interface including an address terminal configured to couple to an external resistor for setting a communication address of the switched mode power supply. A control circuit is configured to determine the value of the external resistor a first time with a first technique and set the communication address of the switched mode power supply based on the value of the external resistor determined using the first technique if the value of the external resistor is greater than the threshold value. The control circuit is also configured to, if the value of the external resistor is less than the threshold value, determine the value of the external resistor a second time with a second technique and set the communication address of the switched mode power supply based on the value of the external resistor determined using the second technique.

Abstract: A switched-mode power supply includes an input, an output, and a transformer including primary and secondary windings. The power supply also includes a synchronous rectifier coupled to selectively conduct current through the secondary winding of the transformer. The synchronous rectifier includes a source, a gate and a drain terminal. The power supply further includes a controller having a supply voltage terminal and a gate terminal to supply a control signal to the gate of the synchronous rectifier, and a circuit coupled between the supply voltage terminal of the controller and at least one of the gate terminal of the controller and the drain terminal of the synchronous rectifier to supply power from the gate terminal of the controller or the drain terminal of the synchronous rectifier to the supply voltage terminal of the controller. Methods of supplying power in switched-mode power supplies are also disclosed.

Abstract: Example MOSFET circuits include a first metal-oxide-semiconductor field-effect transistor (MOSFET) having a gate, a source and a drain, and a second MOSFET coupled in series with the first MOSFET. The second MOSFET has a gate, a source and a drain. The MOSFET circuit also includes a controller configured to supply a same control signal to the gate of the first MOSFET and the gate of the second MOSFET to turn on or turn off the first MOSFET and the second MOSFET when a drain-source voltage of the first MOSFET and a drain-source voltage of the second MOSFET are substantially zero. Other MOSFET circuits and methods of operating MOSFET circuits are also disclosed.

Abstract: A switched-mode power supply includes an input, an output, and a transformer including primary and secondary windings. The power supply also includes a synchronous rectifier coupled to selectively conduct current through the secondary winding of the transformer. The synchronous rectifier includes a source, a gate and a drain terminal. The power supply further includes a controller having a supply voltage terminal and a gate terminal to supply a control signal to the gate of the synchronous rectifier, and a circuit coupled between the supply voltage terminal of the controller and at least one of the gate terminal of the controller and the drain terminal of the synchronous rectifier to supply power from the gate terminal of the controller or the drain terminal of the synchronous rectifier to the supply voltage terminal of the controller. Methods of supplying power in switched-mode power supplies are also disclosed.

Abstract: An electric power supply comprises first and second input circuits for receiving first and second input DC voltages and a control circuit coupled to the first and second input circuits. The control circuit is configured to sense the first input DC voltage and the second input DC voltage and to enable the first input circuit and disable the second input circuit in response to the first input circuit having the highest input DC voltage to substantially prevent current from back feeding to the first input circuit from the second input circuit. The control circuit is also configured to enable the second input circuit and disable the first input circuit in response to the second input circuit having the highest input DC voltage to substantially prevent current from back feeding to the second input circuit from the first input circuit.

Abstract: According to some aspects of the present disclosure, transformers having a screen layer and corresponding methods of winding transformers and are disclosed. Example transformers include at least one transformer core, at least one primary winding layer wound about the transformer core, and at least one secondary winding layer wound about the transformer core. The secondary winding layer includes a secondary winding wire having a width and a number of turns per layer. The transformer also includes at least one screen layer wound about the transformer core and disposed between the primary winding layer and the secondary winding layer. The screen layer includes a screen wire having substantially the same width as the secondary winding wire and substantially the same number of turns per layer as the secondary winding wire, to reduce common mode noise in the secondary winding layer.

Abstract: A power supply comprises a transformer having a primary winding and a secondary winding, a bridge circuit coupled to the primary winding of the transformer, a first rail coupled to the secondary winding of the transformer, and a second rail coupled to the secondary winding of the transformer. The bridge circuit comprises a plurality of switches. The power supply also comprises a first sensor assembly coupled to generate a first error signal representing a difference between currents in the first rail and the second rail. A controller is configured to alter a duty cycle of a first switch of the plurality of switches relative to a duty cycle of a second switch of the plurality of switches based on the first error signal.

Abstract: A switched mode power supply includes a communication interface and an address terminal for setting a communication address for the power supply using the resistance of an external resistor when the external resistor is coupled to the address terminal. The power supply is configured to determine a first resistance value for the external resistor using a first technique, determine a second resistance value for the external resistor using a second technique, set the communication address of the power supply using the first resistance value if the first resistance value is greater than a threshold value, and set the communication address of the power supply using the second resistance value if the first resistance value is less than the threshold value. Other example switched mode power supplies, power systems including one or more power supplies, and methods for setting a communication address of a power supply are also disclosed.